Earthquake activity in Pakistan is mainly concentrated in the north and western sections of the country‚ along the boundary of the Indian plate and the Iranian and Afghan micro-plates. The Chaman Fault runs along Pakistan’s western frontier with Afghanistan from Kalat‚ in the northern Makran range‚ past Quetta and then on to Kabul‚ Afghanistan. A fault also runs along the Makran coast and is believed to be of the same nature as the West Coast fault along the coast of Maharashtra‚ India. An active
Premium Pakistan Sindh Indus River
Earth’s tectonic plates. Tectonic plates shift when two separated pieces of Earth’s crust push together because of the pressure of the hot air below them pushing up on the plates from the heat of the Earth’s core. This pressure must be released somehow‚ so when the pressure becomes too great for the plates to withstand‚ one part of a plate gives way to the pressure by rising above the other part of the tectonic plate. This then causes the top plate to overlap and collide with the other plate. This collision
Premium Earth Plate tectonics Earthquake
destructive plate boundary. The Nazca Plate which is an oceanic plate in the west is dragged to move towards the South American Plate which is a continental plate in the east. The force driving the two plates to collide is resulted by converging subcrustal currents of magma in the asthenosphere below the earth crust. Such slow collision of the two plates takes place very slowly over millions of years in earth’s history. Due to the heavier density of the oceanic crust‚ the Nazca Plate is subducted
Premium Plate tectonics
zone When 2 continental plates collide. Neither plate is forced under the other‚ nor so both are forced up and form fold mountains. Composite volcano Composite volcanoes are made up of alternating layers of lava and ash (other volcanoes just consist of lava). They are usually found at destructive or compressional boundaries. Cone They are the build-up of rock from the volcanic vent; it piles up in the shape of a cone with a central crater. Conservative plate boundary a plate boundary where the relative
Free Plate tectonics
In this essay I will tell you about the main parts of a volcano and it’s origin. The first main part I will tell you about is the magma chamber. A magma chamber is a large pool of molten rock‚ also called magma‚ sitting underneath the Earth’s crust. The magma chamber can be more than three miles below the Earth’s surface and the magma waits there for the pressure and gases to become too much to stay stable. The magma in the magma chamber is less tense than the mantle surrounding it‚ so it moves toward
Free Plate tectonics Volcano Earth
example of a regular volcanic eruption caused by a ‘Hawaiian’ Volcano is Kīlauea which has been continuously erupting since January 1983‚ and has causes no loss of life. Looking at the proprieties of the magma explains why eruptions along subduction plate boundaries product more ‘hazardous’ eruptions‚ and this is one of the reasons that a volcano becomes more hazards because the more viscous a material is the more pressure build up will occur within the volcano‚ causing more explosive eruptions. Explosive
Premium Volcano Volcanology Magma
Chapter 4 plate tectonics Need a Hint? 1.What evidence proved that South America‚ Africa‚ India‚ and Australia were once covered by glaciers? glacial deposits and rock surfaces scarred by glaciers 2. What happens when an oceanic plate converges with a continental plate? The denser oceanic plate slides under the less dense continental plate. 3. A divergent boundary is a boundary between two plates that __________. Move away from each other. 4.Do two colliding continental plates always
Premium Plate tectonics Earth Convergent boundary
place to visit. The spectacular island is the second largest in Europe and located between the Greenland Sea and the Atlantic Ocean. It sits on a constructive plate boundary; the violent tug of war between the two plates causes Iceland to gradually get bigger. Iceland is the most volcanically active place in the world‚ due to tectonic plate activity. Disruptive eruptions occur about every five years. The most recent eruption of Eyjafjallajokull in April 2010‚ caused havoc both internationally and
Free Plate tectonics Volcano
An Introduction to Structural Geology Introduction Structural geology is the study of the features formed by geological processes. Features include faults‚ folds and dipping strata. Geologists can work out the order of events and see which events are related by taking fairly simple measurements and using simple methods. Measurements and Techniques The most obvious thing to do when trying to decipher the structural history of a formation is to describe it. One way of doing this is to measure the dip and strike
Premium Plate tectonics
Plate Tectonics Plate Tectonics The theory of plate tectonics was developed in the 1960’s and states that the earth is broken into a number of shifting plates. Plate tectonics also provides geology with a comprehensive theory of how the earth’s crust moves. In this essay I will explain the different types of plate movements‚ how the plates move and how this movement affects earthquakes and volcanoes. To begin‚ there are three different types of plate movement; divergent boundaries‚ convergent
Premium